Flame King YSN401 40 lb DOT Portable LP Propane Cylinder with OPD Valve

Flame King

<h3>About Flame King</h3><p>Founded in 1998 and headquartered in Pico Rivera, California, Flame King has spent over two decades earning its reputation as one of the most trusted names in propane equipment. <strong>Flame King</strong> designs and manufactures a comprehensive lineup of propane cylinders, tanks, pressure regulators, hoses, and accessories — built to meet the needs of campers, RV enthusiasts, homeowners, and commercial users worldwide.</p><p>What sets Flame King apart is its relentless focus on safety and engineering integrity. Every cylinder and tank the company produces is manufactured to Department of Transportation (DOT) specifications, and their facilities operate under ISO 9002-certified Quality Management Systems. Tanks undergo rigorous X-ray and hydrostatic testing, and each product is engineered to exceed industry safety standards — not merely meet them.</p><p>One of Flame King's most notable innovations is its line of <a href="/56144-liquid-propane-gas-lpg-fuel-tank-flame-king-18053">Liquid Propane Gas (LPG) Fuel Tanks</a>, which range from compact 1 lb. portable cylinders all the way up to 420 lb. units for residential and commercial use. Perhaps most groundbreaking is their DOT-certified refillable 1 lb. propane cylinder — the first of its kind on the market — featuring a patented valve design that makes it the only 1 lb. tank legally and lawfully refillable and transportable. This eco-conscious approach reduces hazardous waste while saving users money over the long term.</p><p>Beyond tanks, Flame King has developed an extensive ecosystem of <a href="/200642-lpg-product-accessories-flame-king-18053">LPG Product Accessories</a> tailored to make propane use safer and more convenient. From dual-tank mounting racks and wireless propane scales to OPD replacement valves and cylinder backpack carriers, these accessories are engineered to integrate seamlessly with Flame King's tank lineup and many other compatible systems.</p><p>For RV owners and off-grid adventurers, Flame King's <a href="/49228-gas-cylinder-pressure-regulator-flame-king-18053">Gas Cylinder Pressure Regulators</a> are an essential component. Their two-stage auto-changeover regulators automatically switch from a depleted primary tank to a full reserve tank — with a color-changing indicator window to signal when a swap is needed — ensuring uninterrupted propane flow to appliances. These UL-listed regulators are factory-set for consistent pressure delivery and rated for demanding BTU loads.</p><p>Completing the system, Flame King offers a robust selection of <a href="/200539-hoses-flame-king-18053">Hoses</a> designed to connect cylinders, regulators, and appliances safely and reliably. Built with thermoplastic construction for weather resistance and solid brass fittings for leak-proof durability, these hoses are available in multiple lengths and configurations to suit everything from backyard griddles to full RV setups.</p><p>Whether you are outfitting a camper van for a cross-country trip, fueling a backyard cookout, or managing propane systems for a commercial application, Flame King delivers the equipment and the confidence to keep the flame burning safely.</p>